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EP 1 085 946 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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06.11.2002 Bulletin 2002/45 |
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Date of filing: 18.06.1999 |
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International application number: |
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PCT/DK9900/335 |
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International publication number: |
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WO 9906/5612 (23.12.1999 Gazette 1999/51) |
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SPREADER FOR SPREADING A FLUID, SUCH AS AN ADHESIVE
VERTEILVORRICHTUNG FÜR EIN FLUID WIE KLEBSTOFF
REPANDEUSE PERMETTANT D'ETALER UN FLUIDE DU TYPE ADHESIF
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Designated Contracting States: |
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AT BE CH DE ES FI FR GB LI |
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Priority: |
18.06.1998 DK 82598
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Date of publication of application: |
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28.03.2001 Bulletin 2001/13 |
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Proprietor: Casco A/S |
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3480 Fredensborg (DK) |
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Inventor: |
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- KAMSTRUP-LARSEN, Jorgen
DK-3450 Allerod (DK)
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Representative: Thierry-Carstensen, Ole Jean et al |
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Chas. Hude A/S,
33 H.C. Andersens Boulevard 1553 Copenhagen V 1553 Copenhagen V (DK) |
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References cited: :
US-A- 3 895 984
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US-A- 4 419 141
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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Technical Field
[0001] The invention relates to a spreader for spreading a fluid, such as an adhesive, in
a thin layer on a surface, said spreader comprising an oblong spreader housing and
a plurality of outlet nozzles which are arranged at regular intervals along one side
of the spreader housing, and which are connected to a feeding channel system accommodated
in the housing and in turn connected to an inlet opening for said fluid.
Background Art
[0002] It is known to apply adhesive onto a large surface through a number of nozzles in
a spray spreader. The adhesive in question is pumped from a suitable source to a coupling
device through a conduit, said conduit or conduits (used in connection with a two-component
adhesive) being connected to the spreader. The known spreader comprises often a pipe
or bar-like member of a length rendering it possible to coat the surface in question
with the adhesive layer in question by way of a single relative movement of said surface
past the spreader. Therefore, the nozzles in question are arranged adjacent one another
at regular intervals. Such spreaders are for instance used in connection with plants,
where the plates to be coated with an adhesive layer are advanced stepwise on a conveyor
belt, said plates being advanced in lengths corresponding to the length of a spreader,
such as 0.5 m, in each step. Subsequently, the spreader is moved transverse to the
advancing path of the conveyor belt at the same time as adhesive is fed through the
nozzles of the spreader. After each transverse movement of the spreader, the plate
placed on the conveyor belt is advanced yet another step. Such plants can for instance
process plates of up to 3 times 6 m to be used for the production of sandwich elements.
The adhesive types in question are typically high-viscous fluids requiring a high
pressure, such as 20 to 180 bar, in order to be pressed through feeding conduits and
nozzles. A spreader for applying adhesive onto such plates comprises a very high number
of nozzles, and accordingly it is very difficult to keep such nozzles clean or to
clean said nozzles after the use thereof. Often it is not possible to carry out such
a cleaning process without the use of suitable solvents. Accordingly, the cleaning
process is both cost-intensive and time-consuming.
Brief Description of the Invention
[0003] The object of the present invention is to provide a spreader avoiding the necessity
of a cost-intensive and time-consuming cleaning process as well as the use of separate
solvents.
[0004] The above is obtained by the spreader according to the invention being characterised
in that the nozzles, their feeding channel system, and the inlet opening being shaped
in a separate lining detachably secured in the housing, whereby the housing comprises
cavities receiving the lining and being adapted to fixedly clamp around said lining
during the use of the spreader, at least one opening being provided in said housing,
where the nozzles project from the interior of the housing through said opening.
[0005] When this spreader is used, nothing but the lining is replaced by a new lining when
required by the nozzles or the associated feeding channel system.
[0006] The lining may particularly advantageously comprise two interconnected, substantially
plate-shaped lining members with recesses provided therein to form the nozzles the
feeding channel system of said nozzles as well as the inlet opening. Such plate--shaped
lining members are easy to manufacture of a suitable disposable material, such as
board or plastics.
[0007] The housing may according to the invention comprise two hingedly interconnected housing
parts provided with means for tightening said housing parts around the lining with
the result that the opening and the closing of said housing is particularly simple.
[0008] Moreover, the lining members may according to the invention be plate or sheet-extruded,
vacuum-moulded plates of plastics, which are glued or welded to one another, whereby
the outlet nozzles shaped in one lining member comprise outlet orifices or openings
resulting from a cutting off of portions of said lining member. The resulting manufacture
of the lining members is particularly easy and inexpensive.
[0009] Furthermore, the nozzles may according to the invention be shaped in a number of
rows protruding from a plane of a first plate-shaped lining member in such a manner
that each nozzle extends from a plane portion coinciding with the side facing the
second lining member, and the feeding channel system may form a nozzle feeding chamber
adjacent said nozzles, where said nozzle feeding chamber is formed by a coherent recess
in the second lining member opposite said nozzles. As a result, a particularly simple
feeding of the nozzles is obtained.
[0010] According to the invention the nozzle feeding chamber may particularly advantageously
be formed by a small, trough-shaped recess in the second lining member, where said
small trough-shaped recess extends along the row or rows of nozzles and comprises
longitudinal sides, of which one longitudinal side is positioned opposite the area
along one side of the row or rows of nozzles and the other longitudinal side is positioned
opposite the area along the opposite side of the row or rows of nozzles, but at a
predetermined distance therefrom, said latter area being positioned upstream relative
to the flow direction of the fluid inside the feeding channel system, and where a
comparatively larger recess is provided opposite the small trough-shaped recess at
the upstream side and along the row or rows of nozzles in the first lining member
comprising said nozzles, whereby a distribution chamber is formed in this portion
of the feeding channel system, said distribution chamber communicating directly with
the nozzle feeding chamber. The spreader is particularly suited for use in connection
with an application process involving returning interruptions between the individual
applications of adhesive while producing a multilayer sandwich element or when said
element is to be replaced. These interruptions can last from 1 minute and up to several
hours. The structure in question of the nozzles with the associated feeding chamber
and distribution chamber ensures that the interruption does not involve a noticeable
afterflow of the adhesive in question, which is due to the fact that the adhesive
present at a level above the nozzles is not significant and that said adhesive is
instead present in the distribution chamber at a level below the inlet of each nozzle.
The possible interruption period in question depends, of course, on the type of adhesive
in question because said type of adhesive must not, of course, be able to cure inside
the interior of the nozzles during said interruption period.
[0011] According to the invention, the portion of the feeding channel system adjacent the
distribution chamber may be formed substantially by one or more recesses in the first
lining member housing the nozzles, whereby the afterflow of adhesive material in connection
with an interruption of the application process is not additionally stimulated.
[0012] The feeding channel system may according to the invention be provided with one or
more static mixers, whereby the components of the adhesive material are efficiently
mixed during the flow towards the nozzles. This or these static mixer(s) may according
to the invention be arranged in their respective separate tubes, whereby it is ensured
that the adhesive material does not flow round said static mixers because the separate
tubes associated with said mixers can be formed very accurately to fit said static
mixers.
[0013] A static mixer with the associated separate tube may according to the invention be
arranged in connection with the inlet opening and comprise projecting members with
means for coupling the spreader to a mixer head, which in turn comprises means for
connecting conduits thereto, said conduits communicating with sources with their respective
components of a two-component adhesive system. As a result, a particularly simple
connection is obtained between the lining and the conduit system advancing the adhesive
to the spreader.
[0014] The second lining member may according to the invention be made of a resilient plastic
material, and the spreader may comprise means for allowing a closing of each nozzle
by pressing the second lining member towards the first lining member opposite each
nozzle.
Brief Description of the Drawings
[0015] The invention is explained in greater detail below with reference to the accompanying
drawings, in which
Fig. 1 is a perspective view of a spreader according to the invention and connected
to a mixer head and conduits associated therewith for the feeding of the individual
components of a two-component adhesive system,
Fig. 2 is a cross sectional, slightly staggered view taken along the line II-II of
Fig. 3 of the housing of the spreader of Fig. 1,
Fig. 3 is a view taken along the line III-III of Fig. 2 of one housing part,
Fig. 4 is a sectional view taken along the line IV-IV of Fig. 5 through lining members
to be arranged inside the spreader housing,
Fig. 5 is a view taken along the line V-V of Fig. 4 through one first lining member
with a static mixer inserted therein,
Fig. 6 is a sectional view taken along the line VI-VI of Fig. 7 through a second embodiment
of a spreader according to the invention with associated lining members and static
mixers, the individual parts being spaced apart for the sake of clarity,
Fig. 7 is a view taken along the line VII-VII of Fig. 6 of one first lining member
associated with the spreader of Fig. 6, said first lining member being shown with
the associated static mixers, and
Fig. 8 is a diametrically sectional view through a closable nozzle of a portion of
a third embodiment of a spreader according to the invention.
Best Mode for Carrying Out the Invention
[0016] The spreader illustrated in Fig. 1 is designated the general reference numeral 1
and comprises two substantially plate-shaped housing parts 2 and 3 hingedly interconnected
by means of hinges 4 to 8. These housing parts can be firmly fixed to one another
by means of clamping means 9 to 18. When firmly fixed to one another, these housing
parts 2, 3 form a housing, through which a fluid, such as an adhesive, can be applied
onto a plate being carried past the spreader 1 at a level therebelow while said spreader
1 is maintained in a state in which the bottom side of the lower housing part 2 is
arranged at a substantially horizontal plane.
[0017] A conduit 19 connects the spreader 1 with a mixer head 20 by means of a coupling
nut 21. The mixer head 20 is connected to two conduits 22 and 23 for the feeding of
their respective components of a two-component adhesive system. The two components
of the adhesive system are fed to the conduits 22 and 23 by means of suitable pumps
from their respective sources and mixed in the mixer head 20. The two components of
the adhesive system leave the mixer head 20 in a mixed state and flow through the
conduit 19 into the spreader 1.
[0018] As illustrated in Figs. 2 and 3, the housing parts 2 and 3 of the spreader are provided
with recesses or cavities on the opposing sides, said recesses being adapted to receive
their respective lining members, cf. Figs. 4 and 5. These lining members comprise
a first lining member 32 to be received in the lower housing part 3 and a second lining
member 33 to be received in the upper housing part 3. Each lining member 32 and 33
is made of plate or sheet-extruded plates of plastics. The plate or sheet-extruded
plates are vacuum-moulded in such a manner that they define a feeding channel system
at the reference numeral 34, cf. Fig. 5, when they abut one another. This feeding
channel system extends from an opening provided at the reference numeral 35 and to
a double row of nozzles 36 shaped in the first lining member 32. Each row of nozzles
36 comprises an outlet opening 37 resulting from a cutting off of plastic material
from the vacuum-moulded plate.
[0019] The two lining members 32 and 33 are glued or welded to one another and then placed
between the two housing parts 2 and 3. Subsequently, the housing parts 2 and 3 are
tightened together in such a manner that the plane portions of the lining members
adjacent the recesses sealingly abut one another, said recesses defining the feeding
channel system 34 and the rows of nozzles 36. A comparison of Figs. 4 and 5 demonstrates
that the recesses in the two lining members are shaped substantially symmetrically
everywhere from the inlet openings 35 to a distribution chamber 38 arranged parallel
to the nozzles 36. The distribution chamber 38 is defined by a relatively deep recess
39 in the first lining member 32 and a relatively shallow recess 40 continuing into
a further relatively shallow recess 41 in the second lining member 33. The relatively
shallow recess extends like a trough opposite the row of nozzles 36, and the adhesive
material flowing through the feeding channel system 34 and through the distribution
chamber 38 is distributed through said trough 41 to the nozzles in such a manner that
the adhesive is uniformly distributed to the individual nozzles.
[0020] The individual nozzles can be shaped with a varying outlet cross section and/or opposite
a relatively shallow trough-shaped recess 41 of a varying depth in order to ensure
a uniform volume flow rate out of the nozzles 36.
[0021] As the feeding channel system 34 continues into a distribution chamber adjacent the
nozzles 36, and as most of said distribution chamber in use is positioned in the first
lining member at a level below the inlet of each nozzle 36, and the trough-shaped
nozzle feeding chamber 41 is of a relatively low depth in the second lining member,
this structure of the feeding channel system has the effect that only a relatively
small amount of adhesive is present at a level above said inlet to the nozzles with
the result that an interruption of the propulsion of said adhesive does not cause
a noticeable afterflow of adhesive out of the nozzles 36.
[0022] A tube 45 of plastics or metal is clamped between the lining members 32 and 33 in
the first portion of the feeding channel system 34, said tube comprising a static
mixer 36 of a conventionally known type, such as Kenics sold by Tah Europe Incorporation
UK. The tube 45 is shaped such that at its end positioned outside the inlet opening
35 it can carry a union nut 21, cf. also Fig. 1, which is adapted to couple the spreader
to the mixer head 20.
[0023] As mentioned above, the housing parts 2 and 3 are provided with recesses allowing
the receiving of the lining members 32 and 33. As illustrated in Figs. 2 and 3, these
recesses comprise two rows of through openings 47 with chamfered edges 48. These openings
47 are adapted to receive their respective nozzles 36 in the first lining member 32
in such a manner that each nozzle is supported by the housing part 2 along its periphery.
[0024] The embodiment illustrated in Figs. 6 and 7 of the spreader comprises a lower and
an upper housing part 52 and 53, respectively, with an associated first and second
lining member 62 and 63. The lining members 62 and 63 are shaped slightly different
from the previously described lining members 32 and 33, and accordingly the recesses
of the housing parts 52 and 53 are also shaped slightly different so as to fit said
lining members. As illustrated at the reference numeral 64, the feeding channel system
extends from an inlet opening 65 shaped by means of a branch not shown n greater detail.
This branch extends through one of the housing parts 52 or 53 and comprises a device
(not shown in greater detail either), which ensures a possibility of coupling said
branch to a mixer head or the like feeding device. The feeding channel system extends
in a manner defined by symmetrical recesses in the two lining members 62 and 63 from
the inlet opening to a distribution chamber 66 which in turn extends parallel to a
row of nozzles 67. The feeding channel system 64 forms a branching immediately before
the distribution chamber 66 in such a manner that said distribution chamber 66 is
supplied with adhesive through two channel sections 68 and 69. A relatively shallow
trough-shaped recess 70 is formed in the second lining member 63 opposite the recess
provided in the first lining member 62 and defining a portion of the distribution
chamber 66. The relatively shallow trough-shaped recess 70 extends across the nozzles
67 with the result that it forms a connection between the distribution chamber 66
and the inlet opening of the nozzles 67 and accordingly form a chamber for the feeding
of adhesive to the nozzles.
[0025] As illustrated in Fig. 6, the lower housing part 52 is provided with a longitudinal
slot 71. All the nozzles 67 project from the interior of the housing of the spreader
1 through this slot 71 when the two housing parts 52, 53 are tightened together around
the lining members 62 and 63. As illustrated in Figs. 6 and 7, the feeding channel
system 64 of the lining members 62 and 63 is shaped in such a manner that said lining
members can receive static mixers 72, 73 and 74 which are received in their respective
tubes. In the assembled state of the spreader 1 these static mixers are sealingly
clamped between the lining members 62 and 63 in such a manner that adhesive cannot
pass the static mixers round these tubes. Unlike the lining members, it is very easy
to manufacture these tubes so as to exactly fit the static mixers in such a manner
that the adhesive does not pass between the outer periphery of the static mixers and
the inner side of said tubes. When the lining members 62, 63 are shaped and tightened
between the housing parts 52 and 53 in such a manner that the static mixers can be
received in the feeding channel system without the use of the separate tubes and such
that the flow of adhesive does not pass round said static mixers, said separate tubes
can, of course, be omitted.
[0026] Displaceable adjustment means can be provided in connection with each nozzle, whereby
it is possible to adjust the application width of the spreader 1, cf. Fig. 8. These
adjustment means 80 are displaceably mounted in the upper housing part 3, such as
by means of a thread connection. Generally speaking, such an adjustment means comprises
a shank 81 with a head 82 abutting the second lining member 33, said head 82 comprising
a convex surface 83 abutting said second lining member 33. Correspondingly, the second
lining member is shaped with an annular convex surface 84 and a dome 85 extending
centrally downwards towards each nozzle 36 so as to sealingly abut the inner side
of said nozzle 36 at the inlet thereof.
[0027] An activation of the adjustment means 80 causes said means to be moved downwards
towards the nozzle 36. Correspondingly, the upper second lining member 33 must be
made of a resilient material implying that such an activation is possible.
[0028] The spreader according to the invention is as mentioned mainly used for applying
a layer of adhesive onto continuously advanced plates, such as metal plates for the
manufacture of sandwich elements. Before the use, the lining is positioned between
the housing parts 2 and 3 followed by a tightening of said housing parts by means
of the clamping means 9 to 18. Then, the adhesive system in question is carried in
a conventionally known manner to the spreader, optionally in form of two components
through their respective conduits 2, 3 and to a mixer head 20. In the mixer head 20,
the components are mixed and enter the spreader in which the mixing is enhanced by
means of the static mixers, such as 46 or 72 to 74, arranged therein. The adhesive
is carried through the feeding channel system 34, 64 to and through the nozzles 36,
67 and over the relevant surface to be coated with a coating of adhesive. The described
particular shaping of the feeding channel system adjacent the nozzles 36, 67 with
the maximum volume at a level below the inlet opening of said nozzles has the effect
that the adhesive applying process is interrupted for a short or a long period of
time depending on the type of adhesive in question, and without involving a noticeable
afterflow of adhesive through the nozzles and consequently without causing a hardening
of said adhesive inside the nozzles. If adhesive nevertheless appears in the nozzles
after use for a long time or after an interruption for a long time, it is not necessary
to involve a difficult and time-consuming cleaning process because nothing but the
lining of the spreader need to be replaced, said lining being relatively inexpensive
to manufacture and consequently suited for disposable use. As mentioned, the application
width can be adjusted by means of the adjustment means 80, such as by an activation
thereof by means of a screwdriver. These adjustment means can, however, also be adapted
to be adjusted by means of compressed air (not shown).
[0029] The lining is made of a suitable plastic or board material. It can for instance be
manufactured by way of vacuum moulding of plate or sheet-extruded plates of a thermoplastic
ester, such as PET.
[0030] The nozzles can be arranged in one or more rows, and according to an advantageous
embodiment the nozzle opening is of a diameter of 1 to 3 mm, and especially 2 mm.
The centre distance between the nozzles in the same row is advantageously 5 to 10
mm in order to ensure a uniform, carpet-like coating. As mentioned, the nozzle diameter
can vary across the rows of the spreader in order to ensure the same volume flow rate.
[0031] The invention has been described with reference to a preferred embodiment. Many modifications
can be carried out without thereby deviating from the scope of the invention. In connection
with particularly large spreaders, it can for instance be a possibility to provide
additional clamping means in addition to the clamping means 9 to 18 accommodated along
the sides of the spreader, said additional clamping means being positioned between
said sides. For such situations, the linings can be provided with suitable openings
90, cf. Fig. 7, for the passage of the additional clamping means. The lining has been
described as made of two members glued or welded together. The lining can, however,
also be integrally cast by means of suitable soluble cores. The two lining members
can, if desired, also be joined in the spreader housing in another way beyond gluing
or welding.
1. A spreader (1) for spreading a fluid, such as an adhesive, in a thin layer on a surface,
said spreader comprising an oblong spreader housing (2, 3; 52, 53) and a plurality
of outlet nozzles (36, 67) which are arranged at regular intervals along one side
of the spreader housing (2, 3; 52, 53), and which are connected to a feeding channel
system (34, 64) accommodated in the housing and in turn connected to an inlet opening
(35, 65) for said fluid, characterised in that the nozzles (36, 67), their feeding channel system (34, 64) and the inlet opening
(35, 65) are shaped in a separate lining (32, 33; 62, 63), detachably secured in the
housing (2, 3; 52,53), whereby the housing (2, 3; 52, 53) comprises cavities receiving
the lining (32, 33; 62, 63) and being adapted to fixedly clamp around said lining
(32, 33; 62, 63) during the use of the spreader, at least one opening (47, 71) being
provided in said housing (2, 3; 52, 53), where the nozzles (36, 65) project from the
interior of the housing (2, 3; 52, 53) through said opening.
2. A spreader as claimed in claim 1, characterised in that the lining comprises two interconnected, substantially plate-shaped lining members
(32, 33; 62, 63) with recesses provided therein to form the nozzles (36, 67), the
feeding channel system (34, 64) of said nozzles as well as the inlet opening (35,
65).
3. A spreader as claimed in claim 1 or 2, characterised in that the housing comprises two hingedly interconnected housing parts (2, 3) provided with
means (9 to 18) for tightening said housing parts (2, 3) around the lining.
4. A spreader as claimed in claim 1, 2 or 3, characterised in that the lining members (32, 33; 62, 63) are plate or sheet-extruded, vacuum-moulded plates
of plastics which are glued or welded to one another, whereby the outlet nozzles (36,
67) shaped in one lining member comprise outlet orifices or openings (37) resulting
from a cutting off of portions of said lining member.
5. A spreader as claimed in claim 1, 2, 3 or 4, characterised in that the nozzles (36, 67) are shaped in a number of rows protruding from a plane of a
first plate-shaped lining member (32, 62) in such a manner that each nozzle (36, 67)
extends from a plane portion coinciding with the side facing the second lining member
(33, 63), and that the feeding channel system (34, 64) forms a nozzle feeding chamber
(41, 70) adjacent said nozzles (36, 67), where said nozzle feeding chamber is formed
by a coherent recess in the second lining member (33, 63) opposite said nozzles (36,
67).
6. A spreader as claimed in claim 5, characterised in that the nozzle feeding chamber (41, 70) is formed by a small trough-shaped recess in
the second lining member, where said small trough-shaped recess extends along the
row or rows of nozzles (36, 67) and comprises longitudinal sides, of which one longitudinal
side is positioned opposite the area along one side of the row or rows of nozzles
(36, 67) and the other longitudinal side is positioned opposite the area along the
opposite side of the row or rows of nozzles, but at a predetermined distance therefrom,
said latter area being positioned upstream relative to the flow direction of the fluid
inside the feeding channel system (34, 64), and where a comparatively larger recess
is provided opposite the small trough-shaped recess at the upstream side and along
the row or rows of nozzles (36, 67) in the first lining member (32, 62) comprising
said nozzles (36, 67), whereby a distribution chamber (38, 66) is formed in this portion
of the feeding channel system (34, 64), said distribution chamber communicating directly
with the nozzle feeding chamber (41, 70).
7. A spreader as claimed in claim 6, characterised in that the portion of the feeding channel system (34, 64) adjacent the distribution chamber
(38, 66) is formed substantially by one or more recesses in the first lining member
(32, 62) housing the nozzles (36, 67).
8. A spreader as claimed in one or more of the preceding claims 1 to 7, characterised in that one or more static mixers (46; 72, 73, 74) is/are provided in the feeding channel
system (34, 64).
9. A spreader as claimed in claim 8, characterised in that the static mixer(s) (46; 72, 73, 74) is/are arranged in their respective tubes.
10. A spreader as claimed in claim 8 or 9, characterised in that a static mixer (46) with the associated separate tube is arranged in connection with
the inlet opening (35) and comprises projecting members with means for coupling the
spreader (1) to a mixer head (20), which in turn comprises means for connecting conduits
(22, 23) thereto, said conduits communicating with sources with their respective components
of a two-component adhesive system.
11. A spreader as claimed in one or more of the preceding claims 4 to 10, characterised in that the second lining member (33, 63) is made of a resilient plastic material, and that
the spreader (1) comprises means (80) for allowing a closing of each nozzle (36, 67)
by pressing the second lining member (33, 63) towards the first lining member (32,
62) opposite each nozzle (36, 67).
12. A spreader as claimed in one or more of the preceding claims 1 to 11, characterised in that the lining members (33, 63) are integrally cast.
1. Verteiler (1) für das Verteilen eines Fluids, wie z.B. einem Klebstoff, in einer dünnen
Schicht auf einer Fläche, wobei der Verteiler umfasst: ein längliches Gehäuse (2,
3; 52, 53) und eine Mehrzahl von Austrittsdüsen (36, 67), die in regelmäßigen Abständen
entlang einer Seite des Verteilergehäuses (2, 3; 52, 53) angeordnet sind und die mit
einem Zufuhrkanalsystem (34, 65) für das Fluid verbunden sind, welches in dem Gehäuse
untergebracht und seinerseits mit einer Einlassöffnung (35, 65) für das Fluid verbunden
ist, dadurch gekennzeichnet, dass die Düsen (36, 67), ihr Zufuhrkanalsystem (34, 64) und die Einlassöffnung (35, 65)
in einer separaten Auskleidung (32, 33; 62, 63) ausgeformt sind, welche lösbar in
dem Gehäuse (2, 3; 52, 53) befestigt ist, wobei das Gehäuse (2, 3; 52, 53) umfasst:
Hohlräume, welche die Auskleidung (32, 33; 62, 63) aufnehmen und die so konstruiert
sind, dass sie die Auskleidung (32, 33; 62, 63) fest umklammern, wenn sich der Verteiler
im Einsatz befindet, wobei wenigstens eine Öffnung (47, 71) in dem Gehäuse (2, 3;
52, 53) vorgesehen ist, aus der die Düsen (36, 65) vom Inneren des Gehäuses (2, 3;
52, 53) aus durch die Öffnung hindurch hervortreten.
2. Verteiler nach Anspruch 1, dadurch gekennzeichnet, dass die Auskleidung umfasst: zwei miteinander verbundene, im wesentlichen plattenförmige
Auskleidungselemente (32, 33; 62, 63) mit darin vorgesehenen Vertiefungen zur Bildung
der Düsen (36, 67), des Zufuhrkanalsystems (34, 64) der Düsen sowie der Einlassöffnung
(35, 65).
3. Verteiler nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse umfasst: zwei schwenkbar miteinander verbundene Gehäuseteile (2, 3),
die mit Mitteln (9 bis 18) zum Befestigen der Gehäuseteile (2, 3) um die Auskleidung
herum vorgesehen sind.
4. Verteiler nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Auskleidungselemente (32, 33; 62, 63) platten- oder folienextrudierte, vakuumgeformte
Platten aus Kunststoffen sind, die miteinander verklebt oder verschweißt sind, wobei
die in einem Auskieldungselement ausgebildeten Austrittsdüsen (36, 67) Austrittsöffnungen
(37) umfassen, die durch Ausschneiden von Teilbereichen des Auskleidungselementes
gebildet sind.
5. Verteiler nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass die Düsen (36, 67) in einer Anzahl von Reihen ausgeformt sind, welche aus einer Ebene
eines ersten plattenförmigen Auskleidungselementes (32, 62) hervorstehen, und zwar
in einer Weise, dass sich jede Düse (36, 67) von einem Bereich der Ebene erstreckt,
welcher mit der Seite zusammenfällt, die dem zweiten Auskleidungselement (33, 63)
gegenüberliegt, und dass das Zufuhrkanalsystem (34, 64) eine an die Düsen (36, 67)
angrenzende Düsen-Zufuhrkammer (41, 70) bildet, wobei die Düsen-Zufuhrkammer durch
eine ununterbrochene Vertiefung in dem zweiten Auskleidungselement (33, 63) gegenüber
den Düsen (36, 67) gebildet ist.
6. Verteiler nach Anspruch 5, dadurch gekennzeichnet, dass die Düsenzufuhrkammer (41, 70) durch eine kleine, muldenförmige Vertiefung in dem
zweiten Auskleidungselement gebildet ist, wobei sich die kleine, muldenförmige Vertiefung
entlang der Reihe oder den Reihen von Düsen (36, 67) erstreckt und Längsseiten aufweist,
von denen eine gegenüber dem Bereich entlang einer Seite der Reihe oder Reihen von
Düsen (36, 67) angeordnet ist und die andere gegenüber dem Bereich entlang der gegenüberliegenden
Seite der Düsenreihe oder -reihen angeordnet ist, jedoch in einem vorbestimmten Abstand
davon, wobei der letztere Bereich stromaufwärts relativ zur Strömungsrichtung des
Fluids innerhalb des Zufuhrkanalsystems (34, 64) angeordnet ist und wobei eine vergleichsweise
größere Vertiefung gegenüber der kleinen muldenförmigen Vertiefung an der stromaufwärtigen
Seite und entlang der Reihe oder Reihen von Düsen (36, 67) in dem ersten, die Düsen
(36, 67) auf weisenden Auskleidungselement (32, 62) vorgesehen ist, wobei eine Verteilkammer
(38, 66) in diesem Bereich des Zufuhrkanalsystems (34, 64) ausgebildet ist und die
Verteilkammer direkt mit der Düsenzufuhrkammer (41, 70) kommuniziert.
7. Verteiler nach Anspruch 6, dadurch gekennzeichnet, dass der an die Verteilkammer (38, 66) angrenzende Bereich des Zufuhrkanalsystems (34,
64) im wesentlichen durch eine oder mehrere Vertiefungen in dem ersten, die Düsen
(36, 67) aufnehmenden Auskleidungselement (32, 62) gebildet ist.
8. Verteiler nach einem oder mehreren der vorangehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass ein statischer Mischer oder mehrere statische Mischer (46; 72, 73, 74) in dem Zufuhrkanalsystem
(34, 64) vorgesehen ist/sind.
9. Verteilkammer nach Anspruch 8, dadurch gekennzeichnet, daß der/die statische(n) Mischer (46; 72, 73, 74) in ihren jeweiligen Rohren angeordnet
ist/sind.
10. Verteiler nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass ein statischer Mischer (46) mit dem zugeordneten, separaten Rohr in Verbindung mit
der Einlassöffnung (35) angeordnet ist und vorstehende Elemente mit Mitteln für das
Kuppeln des Verteilers (1) mit einem Mischkopf (20) umfasst, welcher seinerseits Mittel
zum Anschließen von Leitungen (22, 23) an diesen aufweist, wobei diese Leitungen mit
Quellen für ihre jeweiligen Komponenten eines Zweikomponentenklebersystems kommunizieren.
11. Verteiler nach einem oder mehreren der vorangehenden Ansprüche 4 bis 10, dadurch gekennzeichnet, dass das zweite Auskleidungselement (33, 63) aus einem elastischen Kunststoffmaterial
besteht und dass der Verteiler (1) Mittel (80) umfasst, die ein Schließen jeder Düse
(36, 67) durch Drücken des zweiten Auskleidungselements (33, 63) hin zum ersten Auskleidungselement
(32, 62) gegenüber jeder Düse (36, 67) ermöglicht.
12. Verteiler nach einem oder mehreren der vorangehenden Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Auskleidungselemente (33, 63) in einem Stück gegossen sind.
1. Répandeuse (1) permettant d'étaler un fluide de type adhésif sur une surface, en une
couche mince, ladite répandeuse comprenant un logement de répandeuse oblong (2, 3
; 52, 53) et une pluralité de buses de sortie (36, 67) qui sont disposées à intervalles
réguliers le long d'un côté dù logement de répandeuse (2, 3 ; 52, 53), qui sont reliées
à un système de canal d'alimentation (34, 64) agencé dans le logement et qui sont
à leur tour reliées à une ouverture d'arrivée (35, 65) dudit fluide, caractérisée en ce que les buses (36, 67), leur système de canal d'alimentation (34, 64) et l'ouverture
d'arrivée (35, 65) sont formées dans une garniture séparée (32, 33 ; 62, 63), montée
de façon amovible dans le logement (2, 3 ; 52, 53), moyennant quoi le logement (2,
3 ; 52, 53) comprend des cavités qui reçoivent la garniture (32, 33 ; 62, 63) et qui
sont adaptées pour se fixer avec sûreté autour de ladite garniture (32, 33 ; 62, 63)
durant l'utilisation de la répandeuse, au moins une ouverture (47, 71) étant ménagée
dans ledit logement (2, 3 ; 52, 53), à l'endroit où les buses (36, 65) se projettent
à partir de l'intérieur du logement (2, 3 ; 52, 53) à travers ladite ouverture.
2. Répandeuse selon la revendication 1, caractérisée en ce que la garniture comprend deux éléments de garniture interconnectés, d'une forme sensiblement
plate (32, 33 ; 62, 63), munis de renfoncements pourvus dans ceux-ci afin de former
les buses (36, 67), le système de canal d'alimentation (34, 64) desdites buses ainsi
que l'ouverture d'arrivée (35, 65).
3. Répandeuse selon la revendication 1 ou 2, caractérisée en ce que le logement comprend deux parties de logement interconnectées de façon articulée
(2, 3), pourvues de moyens (9 à 18) adaptés pour serrer lesdites parties de logement
(2, 3) autour de la garniture.
4. Répandeuse selon la revendication 1, 2 ou 3, caractérisée en ce que les éléments de garniture (32, 33 ; 62, 63) sont des plaques de plastique extrudées
à partir de feuilles ou de plaques, moulées à vide, qui sont collées ou soudées l'une
à l'autre, moyennant quoi les buses de sortie (36, 67) formées dans un élément de
garniture comprennent des orifice ou des ouvertures de sortie (37) résultant d'une
découpe des parties dudit élément de garniture.
5. Répandeuse selon la revendication 1, 2, 3 ou 4, caractérisée en ce que les buses (36, 67) sont constituées d'une série de rangées se projetant en saillie
à partir d'un plan d'un premier élément de garniture en forme de plaque (32, 62) de
telle sorte que chaque buse (36, 67) s'étend à partir d'une partie de plan coïncidant
avec le côté qui fait face au second élément de garniture (33, 63), et en ce que le système de canal d'alimentation (34, 64) forme une chambre d'alimentation des
buses (41, 70) adjacente aux dites buses (36, 67), dans laquelle ladite chambre d'alimentation
des buses est composée d'un renfoncement cohérent dans le second élément de garniture
(33, 63) opposé aux dites buses (36, 67).
6. Répandeuse selon la revendication 5, caractérisée en ce que la chambre d'alimentation des buses (41, 70) est composée d'un petit renfoncement
en forme d'auge dans le second élément de garniture, dans laquelle ledit petit renfoncement
en forme d'auge s'étend le long de la rangée ou des rangées de buses (36, 67) et comprend
des côtés longitudinaux, parmi lesquels un des côtés longitudinaux est placé à l'opposé
de la zone le long d'un côté de la rangée ou des rangées de buses (36, 67) et que
l'autre côté longitudinal est placé à l'opposé de la zone le long du côté opposé de
la rangée ou des rangées de buses mais à une distance prédéterminée de celle(s)-ci,
ladite dernière zone citée étant positionnée en amont par rapport à la direction de
l'écoulement du fluide à l'intérieur du système de canal d'alimentation (34, 64),
et dans laquelle un renfoncement comparativement plus large est pourvu à l'opposé
du petit renfoncement en forme d'auge au niveau d'un côté en amont et le long de la
rangée ou des rangées de buses (36, 67) dans le premier élément de garniture (32,
62) comprenant lesdites buses (36, 67), moyennant quoi une chambre de distribution
(38, 66) est formée dans cette partie du système de canal d'alimentation (34, 64),
ladite chambre de distribution communiquant directement avec la chambre d'alimentation
des buses (41, 70).
7. Répandeuse selon la revendication 6, caractérisée en ce que la partie du système de canal d'alimentation (34, 64) adjacent à la chambre de distribution
(38, 66) est formée sensiblement par un ou plusieurs renfoncements dans le premier
élément de garniture (32, 62) abritant les buses (36, 67).
8. Répandeuse selon une ou plusieurs des revendications précédentes 1 à 7 caractérisée en ce qu'un ou plusieurs mélangeurs fixes (46 ; 72, 73, 74) sont fournis dans le système de
canal d'alimentation (34, 64).
9. Répandeuse selon la revendication 8, caractérisée en ce que les mélangeurs fixes (46 ; 72, 73, 74) sont disposés dans leurs tubes respectifs.
10. Répandeuse selon la revendication 8 ou 9, caractérisée en ce qu'un mélangeur fixe (46), avec son tube séparé correspondant, est placé en connexion
avec l'ouverture d'arrivée (35) et comprend des éléments se projetant avec des moyens
adaptés pour coupler la répandeuse (1) à une tête de mélangeur (20), qui comprend
à son tour des moyens adaptés pour relier les conduites (22, 23) à celle-ci, lesdits
conduites communiquant avec des sources avec leurs composants respectifs d'un système
adhésif à deux composants.
11. Répandeuse selon une ou plusieurs des revendications précédentes 4 à 10, caractérisée en ce que le second élément de garniture (33, 63) est composé d'un matériau en plastique résilient
et que la répandeuse (1) comprend des moyens (84) permettant la fermeture de chaque
buse (36, 67) en pressant le second élément de garniture (33, 63) vers le premier
élément de garniture (32, 62) opposé à chacune des buses (36, 67).
12. Répandeuse selon une ou plusieurs des revendications précédentes 1 à 11 caractérisée en ce que les éléments de garniture (33, 63) sont intégralement coulés.